Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '61ad85d6fad8a2a3445520678121eec52e29467117914906d206ac962130728d' 
  AND token = 'F0UElW/bqSuRMbVBTHzH8Ue2066IrdIfJqGho9z87Qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}